Scaffold clamp



June 24. 1924.

W. J. MYERS SCAFFOLD CLAMP Filed May 2, 1923 A TTORNEYS Patented June 24, 1924.

WILLIAM J. Mamas; or 'rAnaYrowN, new YORK.

SCAFFOLD CLAMP.

Application filed May 2,

T 0 all whom it may concern:

a citizen of the United States, and a resident of Tarrytown, in the county of Westchester and State of New York, have invented a new and Improved Scaffold Clamp, of which the following is a full, clear, and exact description.

This invention relates to scaffold clamps which may be secured to a beam of substan tially any size and shape and act to support a scaffold on the beam at any desired height, the object of the invention being to provide a simple construction which will accomplish these results with a minimum amount of effort on the part of the operator.

Another object of the invention is to provide a scaffold clamp of simple construc tion which may be quickly applied and re moved from a supporting beam orboard in a substantially horizontal direction.

A still further object of the invention is to provide a scaffold clamp provided with means for supporting a scaffolding joist and a plurality of automatically engaging spurs or edges "for preventing slipping.

In the accompanying drawing Figure 1 is a perspective view of a clamp disclosing an embodiment of the invention.

Figure 2 is a longitudinal vertical section through the clamp shown in Figure 1 on a slightly enlarged scale, said clamp being shown in operative position. 2

Referring to the accompanying drawing by numerals, 1 indicates a supporting beam or any kind, as for instance, a two-by-four and 2 indicates a scafifolding joist for supporting the sca'lfolding boards 3. The reference numeral 4 indicates my improved clamp, which may be used on a single upright or beam 1, as shown in Fig. 2, or it may be used to straddle a plurality of uprights to secure the necessary support for the scaffolding.

As indicated in Figure 1, the clamp 4 is provided with a pair of upright bars 5, a pair of upright bars 6, a pair of lower horizontal bars 7 and a pair of upper horizontal bars 8. The respective bars 7 and 8 are provided with connecting sections 9 and 10 of identical construction, each connecting bar being preferably formed integral with the respective bars 7 and 8 and constructed with a sharp edge 11 designed to cut or stick into the supporting beam 1 when the device is in use. It will thus be seen that the upper 1923. Serial no. 636,270.

and lower bars 7 and 8, with theircross bars 9 and 10, form U-shaped structures, which structures are pivotally connected to the vertical bars 5 and 6 by suitable pivotal members, which members are preferably ordinary bolts, though some other form of pivot might be used. It will be noted that the clamp is open on one side, namely, on the side opposite the bars 9 and 10 whereby it may be moved horizontally to a position straddling a support as shown in Figure 2 and then the joist 2 placed in position, which naturally will pull downwardly on the bars 6 and parts immediately connected therewith so as to tilt the respective bars 7 and 8 and cause the edges 11 to dig into the supporting beam 1. At the same time that this occurs, thebars 6 will pinch the joist 2 against the supporting beam 1 and thereby co-act with the edges 11 for provid ing a firm support for the joist 2 and the scaffolding boards 3.

It will be evident that this clamp may be mounted at any point along the supporting beam 1 so that the boards 3 may be ar ranged at any desired height. The beam 1 need not be fastened to anything but may be merely set upright and the parts assembled as shown in Figure 2. Where several of these beams are used, a firm scaffoldin will be provided which may be quickly and easily assembled or disassembled. This arrangement of clamp obviates the necessity of using nails or other devices which will injure the supporting beam 1 and the joist 2. The beam 1 and joist 2, as well as the boards 3, may be used a large'number of times as they are not injured by the clamp. Thecross bars 9 and 10 may be of anydesired length and are preferably made of a length as wide as the usual supporting beam 1. If a narrow supporting beam 1 should be used, this will not prevent a proper action of the clamp so that an extra width of clamp is not objectionable but permits a clamp to be used on large or small supporting beams, boards and the like.

What I claim is 1. A scafiolding clamp, comprising a pair of substantially U-shaped end members, tour connecting bars pivotally connected at their respective ends with said U-shaped members in such a manner that the U-shaped members may swing on the various connections, said clamp being adapted to have the legs of theU-shaped members straddle a support and the closed ends of the U-shaped members act as spurs when the device is in use.

2. A scaffolding clamp, comprising a pair of U-shaped end members, the closed ends of said members being sharpened on the inside so as to act as spurs, and a pinrality of connecting members pivotally connected to both sides of said U-shaped mem- 10 bers for forming a frame which may be collapsed, said frame being adapted to straddle a support When the device is in use With the sharpened edges of the cross members of the U-shapedmembers engaging the support as spurs.

3. A scaffolding clamp, comprising a pair of U-shaped members, bars pivotally connecting the open ends of the members, and another pair of bars pivotally connecting the U-shaped members at points removed from their open ends.

WILLIAM J. MYERS. 

